Mobile computing device having a navigation button combination



FIG. 1 is a frontal view of a mobile computing device having a navigation button combination;

FIG. 2 is a first isometric view of FIG. 1; and,

FIG. 3 is a second isometric view of FIG. 1.

The broken line showing of the inner portion of the elongated oval border of the navigation button represents a boundary within the claimed design while the broken line showing of the inner portion of the display and all other broken lines are directed to environment; the broken lines form no part of the claimed design. 

The ornamental design for a mobile computing device having a navigation button combination, as shown and described. 